Koeppen stopped the car on Jackson Avenue, at the end of Krauszer's parking lot, and arrested the three occupants on charges of assault, robbery, conspiracy and possession of deadly weapons, as well as possession of a license plate stolen from a resident of S. Main Street, Phillipsburg.

Police accused John Wayne Karner, 20, of Pennsylvania Avenue, and two juveniles, 16 and 17, of beating the attendant at Krauszer's with a lead pipe and a wooden club and robbing him of an undetermined amount of money.

Karner was committed by Municipal Judge Joseph Houston to Warren County Jail in lieu of $20,000 bail. The teen-agers were placed in Warren Acres, the juvenile detention center in Oxford Township, to await a hearing.

Police said the attendant, whom they did not name, did not require hospital treatment.

Washington police were assistant by officers from Washington and Oxford townships.